Some of these have already been put up on the fragments page, but I thought I might as well make a thread too. Therefore:

Bottled Rant: a bottle of Dr. Bronner's soap that, if you shampoo with it, makes you understand and believe everything written on Dr. Bronner's soap bottles. If you use it too often it sends you to a world where you're right to believe it.

Hair Weavers: Have you ever noticed that the clump of hair that comes off when you use a comb looks sort of like a big, hairy spider? Well, sometimes it is. And it's one of the really poisonous ones. You might want to start burning your stray hairs, so they can't breed.
(See also the spiders that form when you remove the navel from an orange.)

Macuahuitl Mouth: An individual who sought out the Foundation's help, as whenever this person eats their teeth fall out and are replaced by sharper teeth. At first it was only when they ate hard food, then any solid food, then any food at all. Their teeth are now as sharp as obsidian, and only intravenous feeding prevents the anomaly.

Mirror Hallway: You know how when you put a mirror up to a mirror you see that creepy endless hallway? What if there were two mirrors that, when you held them up to each other, there were things wandering through that hallway, and other hallways connected to it?
Or maybe there's just one creature, but every time you form the hallway it's closer …

Small Girl Wanting A Hug: A 10-year-old girl whose touch causes random bizarre mutations, 75% of which are fatal. She has a three-headed puppy named Muffles. All the rest of her family is dead.

Punny Website: It turns users into spiders, or possibly can only be logged into by people with spiders on them.

Mirror Hallway: You know how when you put a mirror up to a mirror you see that creepy endless hallway? What if there were two mirrors that, when you held them up to each other, there were things wandering through that hallway, and other hallways connected to it?
Or maybe there's just one creature, but every time you form the hallway it's closer …

Something like this exists — except that it's a mirror booth, like a dressing-room, so it's multiple directions instead of a hallway. I don't remember the number, unfortunately. But I think it was Series I.